BACKGROUND: Non-specific chronic low back pain (NSCLBP) refers to a complex condition that involves structural, biomechanical, cognitive, psychological, social, and lifestyle issues. First-line therapies include physical therapy and exercise, as well as psychological follow-up and pain medication. AIM: The aim of this study was to assess the impact of a 6 week center-based program using a multi-axis motorized platform (HUBER) connected with force sensors, that allows the patients to execute isometric exercises on the spine flexion-to-extension ratio at 60 and 120 degrees, pain, trunk flexibility, and disability. DESIGN: The design of the study was prospective, active control, parallel-group, assessor-blinded, randomized controlled trial. SETTING: The setting was outpatients physical therapy clinic. POPULATION: The population analyzed presented NSCLBP. METHODS: Seventy individuals with NSCLBP were randomized into 2 intervention arms (1 to 1 ratio): 1 standard rehabilitation group (STAND) with physiotherapy, balneotherapy and cycloergometer exercises and 2 HUBER rehabilitation group (HUB) with physiotherapy, balneotherapy and HUBER exercises. Both programs lasted 6 weeks, with 4 sessions of 2 hours each per week. RESULTS: Each group reported statistically significant improvements on the isokinetic spine strength, flexibility of the trunk, lumbar joint mobility, muscular endurance of the trunk and of the lower limbs, pain score and disability (p < 0.05). The spine flexion/extension ratio at 60 s improved similarly between groups (-22.23 for HUB, and -13.04 for STAND; p = 0.178) with a greater effect size in HUB. Only HUB reported a significant improvement in the spine flexion-to-extension ratio at 120 s (from 87.3 to 78.6, p = 0.012). HUB reported a greater decrease in the Oswestry Disability Index (-16.83) compared to STAND (-12.11), with a statistically significant effect between groups (p = 0.036). CONCLUSIONS: Exercises performed on the HUBER platform added to physiotherapy and balneotherapy are as effective as a standard rehabilitation program with physiotherapy, balneotherapy and cycloergometer exercises to improve isokinetic spine strength, lumbar joint mobility, flexibility and muscular endurance of the trunk and the lower limbs. In addition, exercising with the HUBER platform result in a greater reduction in disability compared to a standard rehabilitation program.

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